FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Celgene European Investment Co LLC 2. Date of Event Requiring Statement (Month/Day/Year) 07/23/2013 3. Issuer Name and Ticker or Trading Symbol AGIOS PHARMACEUTICALS INC [AGIO] (Last) (First) (Middle) 86 MORRIS AVENUE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) SUMMIT, NJ 07901 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series B Convertible Preferred Stock	  (1)	  (1)	Common Stock	1,887,473	$ (1)	D (2)	Â
Series C-2 Convertible Preferred Stock	  (3)	  (3)	Common Stock	2,123,453	$ (3)	D (2)	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Celgene European Investment Co LLC 86 MORRIS AVENUE SUMMIT, NJ 07901	Â	  X	Â	Â
CELGENE CORP /DE/ 86 MORRIS AVENUE SUMMIT, NJ 07901	Â	  X	Â	Â

Signatures

/s/Perry A Karsen__________________________ Perry A Karsen, Manager		07/23/2013
**Signature of Reporting Person		Date
Perry A Karsen, COO		07/23/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The Series B Convertible Preferred Stock is convertible into Common Stock, without payment of further consideration, on a 1-for-2.75 basis into the number of shares of Common Stock as shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares have no expiration date.
(2)	These shares are owned directly by Celgene European Investment Company LLC, a wholly-owned subsidiary of Celgene Corproration ("Celgene"), and Celgene has the power to vote, acquire, hold and dispose of all shares. Celgene disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.
(3)	The Series C-2 Convertible Preferred Stock is convertible into Common Stock, without payment of further consideration, on a 1-for-2.75 basis into the number of shares of Common Stock as shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares have no expiration date.

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